<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
        <!-- 2. 为 ECharts 准备一个定义了宽高的 DOM -->
        <div id="main" style="width: 850px;height:500px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echarts 
// import * as echarts from 'echarts'
import echarts from 'echarts'
import _ from 'lodash'

export default {
    name: 'HeimavueReport',

    data() {
        return {
            // 需要合并的数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
            };
    },

    created() {
    // 此时，页面上的元素，已经被渲染完毕了！
    },
    async mounted() {
        // 3. 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const {data: res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200) {
            return this.$message.error('获取折线图数据失败！')
        }
        // 4. 准备数据和配置项
        const result = _.merge(res.data,this.options)

    // 5. 展示数据 
    myChart.setOption(result)
},

    methods: {
        
    },
};
</script>

<style lang="less" scoped>

</style>